CN109533220A - A kind of combined type for large-scale semi-submerged ship helps floating device and its construction method - Google Patents
A kind of combined type for large-scale semi-submerged ship helps floating device and its construction method Download PDFInfo
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- CN109533220A CN109533220A CN201811485276.8A CN201811485276A CN109533220A CN 109533220 A CN109533220 A CN 109533220A CN 201811485276 A CN201811485276 A CN 201811485276A CN 109533220 A CN109533220 A CN 109533220A
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- buoyancy tank
- main body
- tank main
- floating device
- wirerope
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
- B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
- B63B43/10—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy
- B63B43/14—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy using outboard floating members
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Revetment (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
A kind of combined type for large-scale semi-submerged ship helps floating device and its construction method, belongs to large ship and offshore engineering technical field.It includes buoyancy tank main body, connecting plate, intercommunicating device, buoyancy regulating and controlling mechanism and limit and buoyancy transmission mechanism that this, which helps floating device,.Buoyancy tank main body is steel watertight case structure, is built using conventional shipbuilding mode, is attached between each buoyancy tank main body by connecting plate, the large size that can be assembled into different scales helps floating device.This helps floating apparatus structure simple, easily fabricated, relatively independent between each buoyancy tank main body, facilitates and is overhauled into inside.It is applied widely, it can be combined into dock and help floating device suitable for different ships.It only needs an exhaust main and air pump is the floating and sinking of controllable whole buoyancy tank.Dismantling and combination are convenient, are not necessarily to underwater operation, can be reassembled into help floating device suitable for other ships or ocean platform after removal, can reuse.
Description
Technical field
The present invention relates to a kind of combined types for large-scale semi-submerged ship to help floating device and its construction method, belongs to large ship
With offshore engineering technical field.
Background technique
The self weight of ship and Offshore Platform Construction is gradually increased, if gross weight reaches 10W tons of lifting pipe laying vessel partly latent, hull
Volume is huger, up to 200 meters, it is wide up to 60 meters, the construction of these ships uses the sectional construction in workshop substantially, in dock
It inside carries out segmentation and block closes up, close up after finishing and filled the water into dock, enter after so that drauht is met certain requirements
Predetermined navigation channel carries out fitting-out and the test of next step.By dock size itself and the limitation of construction ability is allowed to be influenced,
It is frequently encountered in the construction of ship platform and sail during since shipping draft is greater than the depth of water of navigation channel or dock,
It can not sail so as to cause ship grounding or hull bottom and the bottom less than safe distance or reach designated place by shallow waters,
The progress sailed He be further delivered for use for not only affecting ship platform, also results in the damage of hull bottom and dock bottom, makes
At huge economic loss.Solving this problem, there are two types of thinkings, first is that increasing a certain amount of buoyancy for hull to guarantee safety
It undocks, second is that by waters installation of some unstructuredness facilities outside dock to mitigate self weight.Current major shipyard is common
There are two types of methods, first is that floating, this monoblock type buoyancy tank is helped using one-piece steel buoyancy tank, it is bulky, it builds, transport, storage
Difficulty, the scope of application is small, and detailed design is needed before production.Another method is only to install a part of equipment in dock to mitigate certainly
Weight, this method will lead to extension construction period, and at sea installation equipment implements more complicated, and economy is poor.
Summary of the invention
The present invention, which provides, regarding to the issue above a kind of large-scale combined helps floating device and its construction for what is used in dock
Method, this combined type help floating device to be formed by multiple buoyancy tank body combinations, and the surrounding of this buoyancy tank main body can be floating with other
Box main body connection can be assembled into suitable for helping floating device under a variety of different situations, connect, install with hull part again later
Process is located in dock.After ship undocks, the connection for helping floating device and hull is released, it is floated on the surface of the water, thus recycled,
The connection between buoyancy tank main body and buoyancy tank main body is released again, is transported and is stored.
The technical solution adopted by the present invention to solve the technical problems is: a kind of combined type for large-scale semi-submerged ship helps floating
Device, described to help floating device include buoyancy tank main body, and described to help floating device further include connecting plate, means of communication, buoyancy regulating and controlling mechanism
With limit and buoyancy transmission mechanism, the buoyancy tank main body uses the buoyancy tank top plate of right-angle notch, four buoyancy tanks using a quadrangle
Side plate, eight notch side plates and a buoyancy tank bottom plate weld together the case structure for constituting watertight, in buoyancy tank top plate and notch
The edge of side plate is equipped with equally distributed screw rod in a row, using the company equipped with double through-hole between two adjacent buoyancy tank main bodys
Fishplate bar connect with screw rod and is fastened with nut, in addition to being connected between two neighboring buoyancy tank top plate with connecting plate, two neighboring
It is also connected with connecting plate between notch side plate.
The means of communication uses the watertight flange of band connection pipe, the means of communication steam hose of a buoyancy tank main body and another
The means of communication connection of one buoyancy tank main body, steam hose both ends are fixed in the connecting tube of watertight flange with pipe clamp.
The buoyancy regulating and controlling mechanism includes air pump and automatically controlled sea cock and valve, and air pump passes through common air chamber and band connection pipe
Watertight flanged joint, automatically controlled sea cock and valve is set on buoyancy tank bottom plate.
The limit connect combined type with buoyancy transmission mechanism and helps floating device and hull, and limit includes with buoyancy transmission mechanism
Hanging ring, cross spacing wirerope, oblique limit wirerope, safety hook, lifting lug, connection bolt and shackle；Cross spacing steel wire
Shackle is arranged in rope and oblique limit wirerope one end, and shackle is bolted with the lifting lug on connecting plate by connection, and the other end is set
It is equipped with safety hook, safety hook is snapped connection with the hanging ring on hull.
A kind of combined type for large-scale semi-submerged ship helps the construction method of floating device, the construction method the following steps are included:
1) it helps floating hull to obtain the number of required buoyancy tank main body as needed, is successively filled to buoyancy tank main hanger using gantry crane
Designated position in dock；
2) each buoyancy tank main body is adjusted to predetermined combinations position using the adjustable pier of dock bottom, buoyancy tank main body is made to be in identical vertical
In height, the company of the watertight flange for two buoyancy tank main bodys for then being connected at the both ends of steam hose with needs respectively using pipe clamp
Adapter tube connection；By the effective rubber seal of connection of the watertight flange (3a) in the buoyancy tank main body (1) for not needing connection.
3) buoyancy tank main body is connected by connecting plate, screw rod with nut by way of mechanical erection；
4) one end of common air chamber is connected in air pump, the other end is connected in the nearest buoyancy tank side plate top distance Wu Tai
Between watertight flange on；
5) connecting plate and the welding of hull corresponding position after to large ship and Offshore Platform Construction, in close hull side
Upper corresponding lifting lug and hanging ring, then the both ends of cross spacing wirerope, oblique limit wirerope are connected, have safety hook
One end be connected with the hanging ring on hull, one end with shackle is connected with the lifting lug on connecting plate, and when connection laterally limits
Position wirerope, oblique limit wirerope should be at tensioning state；
6) it opens dock gate and flows into dock by seawater, when the water surface in depressed place is concordant with extraneous water surface elevation, opens automatically controlled sea cock and valve, allow
Seawater flows freely into buoyancy tank, observes the waterline variation of hull, closes automatically controlled sea when design helps floatation line wait intake just to reach
Bottom valve, ship can undock safely；
7) after ship is driven out to the waters that dock reaches respective water depth, stop navigation, after steady, open automatically controlled sea cock and valve, allow
Water flows into buoyancy tank main body, observes in Hull sinkage to normal waterline or so, closes automatically controlled sea cock and valve；
8) the connection bolt buckled, cross spacing steel wire are unloaded in dismantling cross spacing wirerope and oblique limit wirerope one end manually
The other end of rope and oblique limit wirerope is naturally drooped under gravity to hull side, is hung on hanging ring, is located at ship
Staff on body recycles cross spacing wirerope and oblique limit wirerope；
9) it after ship sails out of, opens air pump and is drained with automatically controlled sea cock and valve, after water emptying, floating device is helped to float up to
The water surface is dragged into dock；
10) water in dock is emptied, to helping floating device to be disassembled, stored, completion helps floating operation.
The beneficial effects of the present invention are: a kind of combined type for large-scale semi-submerged ship helps floating device and its construction method, help
Floating device includes buoyancy tank main body, connecting plate, intercommunicating device, buoyancy regulating and controlling mechanism and limit and buoyancy transmission mechanism, buoyancy tank main body
Between combination connected and composed by connecting plate help floating device.This helps floating apparatus structure simply easily fabricated, each buoyancy tank main body it
Between it is relatively independent, facilitate and overhauled into inside.It can be combined into dock and help floating device suitable for different ships, fitted
It is wide with range.Adjacent floating tank module is attached by connecting plate and bolt fastener, has good structural strength, and tear open
It unloads conveniently.It is interconnected between each buoyancy tank by steam hose, only needs an exhaust main and air pump i.e. controllable whole
The floating and sinking of buoyancy tank.It combines the wirerope helped between floating device and hull to connect using shackle with safety hook, dismantling side
Just, it is not necessarily to underwater operation, so that recycling Assembled type helps the work of floating device more easy, it after removal can group again
What synthesis was suitable for other ships or ocean platform helps floating device, which helps floating device that can reuse, economy compared with
It is good.
Detailed description of the invention
Fig. 1 is the exterior perspective view of buoyancy tank main body.
Fig. 2 is A enlarged drawing in Fig. 1.
Fig. 3 is B enlarged drawing in Fig. 1.
Fig. 4 is the internal structure chart of buoyancy tank main body.
Fig. 5 is C enlarged drawing in Fig. 4.
Fig. 6 is buoyancy tank main body connection schematic diagram.
Fig. 7 is D enlarged drawing in Fig. 6.
Fig. 8 is that combined type helps floating device to be mounted on the schematic diagram in dock.
Fig. 9 is that combined type helps floating device and hull connection schematic diagram.
Figure 10 is that combined type helps floating device to be installed rear overall structure figure.
In figure: 1, buoyancy tank main body, 1a, buoyancy tank top plate, 1b, buoyancy tank side plate, 1c, buoyancy tank bottom plate, 1d,
Notch side plate, 2, connecting plate, 2a, screw rod, 2b, nut, 3, intercommunicating device, 3a, watertight flange, 3b, pipe clamp, 3c, ventilation
Hose, 4, automatically controlled sea cock and valve, 5, dock, 6, common air chamber, 7, air pump, 8, limit and buoyancy transmission mechanism, 8a, hanging ring, 8b,
Cross spacing wirerope, 8c, oblique limit wirerope, 8d, safety hook, 8e, hull, 8f, lifting lug, 8g, connection bolt, 8h,
Shackle.
Specific embodiment
Below in conjunction with the drawings and the specific embodiments, the present invention will be described:
As shown in Fig. 1,2,4,6, it includes buoyancy tank main body 1 that this combined type for large-scale semi-submerged ship, which helps floating device, connecting plate 2,
Intercommunicating device 3, buoyancy regulating and controlling mechanism and limit and buoyancy transmission mechanism 8, buoyancy tank main body 1 are symmetrical welding box-shaped structure, packet
The 1a of top plate containing buoyancy tank, buoyancy tank side plate 1b, notch side plate 1d and buoyancy tank bottom plate 1c.Structure is connected by connecting plate 2 between buoyancy tank main body 1
Floating device is helped at combined type, the surrounding of buoyancy tank top plate 1a and the two sides of buoyancy tank side plate 1b are equipped with equally distributed screw rod 2a, connection
Double through-hole is set on plate 2, and through-hole passes through screw rod 2a and fixed by nut 2b.The effect of buoyancy tank main body 1 be for large ship with
Offshore platform structure provides buoyancy.The top center position of its four cycle side plate is equipped with watertight flange 3a；In the inner surface of bottom plate
Heart position is welded with a boss, for installing automatically controlled sea cock and valve 4.Connecting plate 2 is the steel plate of uniform pore openings, is used for buoyancy tank main body 1
Between connection, screw rod 2a has enough bulk strengths to guarantee the junction of buoyancy tank main body, including tensile strength and anti-
Cut intensity.
As shown in Fig. 3,5,7,8, means of communication 3 includes watertight flange 3a, steam hose 3c and pipe clamp 3b, watertight flange 3a
It is set to the top of buoyancy tank side plate 1b, steam hose 3c, which is fixedly connected by watertight flange 3a with pipe clamp 3b, is connected in two buoyancy tank masters
Between body 1, the effect of the mechanism is two buoyancy tank main bodys 1 for being connected at the both ends of steam hose 3c with needs respectively using pipe clamp
The connecting tube of watertight flange 3a connects, to realize the connection between buoyancy tank main body 1.Buoyancy regulating and controlling mechanism includes 7 He of air pump
Automatically controlled sea cock and valve 4, air pump 7 are connect by common air chamber 6 with the connecting tube of watertight flange 3a.Automatically controlled sea cock and valve 4 is set to floating
On the inner surface of bottom plate 1c.The effect of buoyancy regulating and controlling mechanism is to control sea by control sea cock and valve 4 and the switch of air pump 7
Water enters in buoyancy tank main body 1, and on the one hand adjustable combined type helps the buoyancy size of floating device, on the other hand can sail in ship
From rear, make its floating, to be recycled, split, stored in turn.
As shown in Figures 9 and 10, combined type helps floating device and hull 8e connect by limit with buoyancy transmission mechanism 8, limit and
Buoyancy transmission mechanism 8 include hanging ring 8a, cross spacing wirerope 8b, oblique limit wirerope 8c, safety hook 8d, lifting lug 8f,
Connect bolt 8g and shackle 8h.Cross spacing wirerope 8b and oblique limit one end wirerope 8c are arranged shackle 8h, shackle 8h with
For lifting lug 8f on connecting plate 2 by connection bolt 8g connection, the other end is provided with safety hook 8d, safety hook 8d and hull 8e
On hanging ring 8a snap connection.Two lifting lug 8f are welded on the connecting plate 2 that each needs are attached with hull, on hull
Two hanging ring 8a are welded in corresponding position simultaneously, and cross spacing wirerope 8b and oblique limit wirerope 8c are had the one of shackle
End is connected with the lifting lug 8f on connecting plate 2, and one end with safety hook 8d is connected with the hanging ring 8a on hull, and mechanical erection is made
Industry can be completed in side.The effect of the mechanism is combined type to be helped floating device connect with hull, and one end is connected to buoyancy tank
Hanging ring on, the other end is connected on hull, wherein horizontal wirerope be used to limit lateral displacement, offset lateral interference
Power, another slanting limit wirerope are used to transmit buoyancy, limit vertical deviation.
A kind of combined type for large-scale semi-submerged ship help the construction method of floating device the following steps are included:
1, it helps floating hull to obtain the number of required buoyancy tank main body 1 as needed, is successively lifted buoyancy tank main body 1 using gantry crane
Designated position into dock 5；
2, each buoyancy tank main body 1 is adjusted to predetermined combinations position using the adjustable pier of dock bottom, buoyancy tank main body 1 is made to be in identical perpendicular
In straight height, the watertight of pipe clamp 3b two buoyancy tank main bodys 1 for connecting at the both ends of steam hose 3c with needs respectively is then utilized
The connecting tube of flange 3a connects；The effective rubber of connection of watertight flange (3a) in the buoyancy tank main body (1) for not needing connection is close
Envelope；
3, buoyancy tank main body 1 is connected by connecting plate 2, screw rod 2a with nut 2b by way of mechanical erection；
4, one end of common air chamber 6 is connected in air pump 7, the other end is connected on the nearest buoyancy tank side plate 1b of distance Wu Tai
On watertight flange 3a among portion；
5, after to large ship and Offshore Platform Construction, connecting plate 2 and hull 8e in the close side hull 8e correspond to position
The upper corresponding lifting lug 8f and hanging ring 8a of welding is set, then the both ends of cross spacing wirerope 8b, oblique limit wirerope 8c are connected
On, one end with safety hook 8d is connected with the hanging ring 8a on hull, one end with shackle 8h and hanging on connecting plate 2
Ear 8f is connected, and cross spacing wirerope 8b, oblique limit wirerope 8c should be at tensioning state when connection；
6, it opens dock gate and flows into dock 5 by seawater, when the water surface in depressed place is concordant with extraneous water surface elevation, open automatically controlled sea cock and valve 4,
Allow seawater to flow freely into buoyancy tank, observe hull waterline variation, wait intake just reach closed when design helps floatation line it is automatically controlled
Sea cock and valve 4, ship can undock safely；
7, after ship is driven out to the waters that dock reaches respective water depth, stop navigation, after steady, open automatically controlled sea cock and valve 4, allow
Water flows into buoyancy tank main body 1, observes in Hull sinkage to normal waterline or so, closes automatically controlled sea cock and valve 4；
8, the connection bolt 8g on cross spacing wirerope 8b and oblique limit wirerope 8c one end shackle 8h is disassembled manually, laterally
The other end of limit wirerope 8b and oblique limit wirerope 8c are naturally drooped under gravity to hull side, are hung over and are hung
On ring 8a, the staff on hull recycles cross spacing wirerope 8b and oblique limit wirerope 8c；
9, it after ship sails out of, opens air pump 7 and is drained with automatically controlled sea cock and valve 4, after water emptying, floating device is helped to float
To the water surface, it is dragged into dock；
10, the water in dock 5 is emptied, to helping floating device to be disassembled, stored, completion helps floating operation.
Claims (5)
1. a kind of combined type for large-scale semi-submerged ship helps floating device, described to help floating device include buoyancy tank main body (1), and feature exists
In: it is described that floating device is helped to further include connecting plate (2), means of communication (3), buoyancy regulating and controlling mechanism and limit and buoyancy transmission mechanism
(8), the buoyancy tank main body (1) uses the buoyancy tank top plate (1a) of right-angle notch, four buoyancy tank side plates (1b), eight using a quadrangle
A notch side plate (1d) and a buoyancy tank bottom plate (1c) weld together the case structure for constituting watertight, in buoyancy tank top plate (1a) and
The edge of notch side plate (1d) is equipped with equally distributed screw rod (2a) in a row, uses between two adjacent buoyancy tank main bodys (1)
Connecting plate (2) equipped with double through-hole connect with screw rod (2a) and is fastened with nut (2b), except in two neighboring buoyancy tank top plate
It is outer with connecting plate (2) connection between (1a), it is also connected with connecting plate (2) between two neighboring notch side plate (1d).
2. a kind of combined type for large-scale semi-submerged ship according to claim 1 helps floating device, it is characterised in that: the company
Logical mechanism (3) use the watertight flange (3a) of band connection pipe, means of communication (3) steam hose (3c) of a buoyancy tank main body (1)
It is connect with the means of communication (3) of another buoyancy tank main body (1), the steam hose both ends (3c) are fixed on watertight flange with pipe clamp (3b)
In the connecting tube of (3a).
3. a kind of combined type for large-scale semi-submerged ship according to claim 1 helps floating device, it is characterised in that: described floating
Power regulating and controlling mechanism includes air pump (7) and automatically controlled sea cock and valve (4), and air pump (7) passes through the water of common air chamber (6) and band connection pipe
Close flange (3a) connection, automatically controlled sea cock and valve (4) are set on buoyancy tank bottom plate (1c).
4. a kind of combined type for large-scale semi-submerged ship according to claim 1 helps floating device, it is characterised in that: the limit
Position connect combined type with buoyancy transmission mechanism (8) and helps floating device and hull (8e), and limit includes hanging ring with buoyancy transmission mechanism (8)
(8a), cross spacing wirerope (8b), oblique limit wirerope (8c), safety hook (8d), lifting lug (8f), connection bolt (8g)
With shackle (8h)；Cross spacing wirerope (8b) and oblique limit wirerope one end (8c) setting shackle (8h), shackle (8h) with
For lifting lug (8f) on connecting plate (2) by connection bolt (8g) connection, the other end is provided with safety hook (8d), safety hook
(8d) is snapped connection with the hanging ring (8a) on hull (8e).
5. a kind of combined type for large-scale semi-submerged ship helps the construction method of floating device according to claim 1, feature exists
In, the construction method the following steps are included:
1) floating hull is helped to obtain the number of required buoyancy tank main body (1) as needed, using gantry crane successively by buoyancy tank main body (1)
Lift the designated position into dock (5)；
2) each buoyancy tank main body (1) is adjusted to predetermined combinations position using the adjustable pier of dock bottom, buoyancy tank main body (1) is made to be in phase
With the two buoyancy tank main bodys in vertical height, then connected at the both ends of steam hose (3c) with needs respectively using pipe clamp (3b)
(1) connecting tube of watertight flange (3a) connects；By the connection of the watertight flange (3a) in the buoyancy tank main body (1) for not needing connection
Effective rubber seal；
3) buoyancy tank main body (1) is connected by connecting plate (2), screw rod (2a) and nut (2b) by way of mechanical erection；
4) one end of common air chamber (6) is connected on air pump (7), the other end is connected to the nearest buoyancy tank side plate of distance Wu Tai
On watertight flange (3a) among the top (1b)；
5) after to large ship and Offshore Platform Construction, in the connecting plate (2) and hull (8e) close to the side hull (8e)
Corresponding position welds upper corresponding lifting lug (8f) and hanging ring (8a), then by cross spacing wirerope (8b), oblique limit wirerope
In the both ends connection of (8c), one end with safety hook (8d) is connected with the hanging ring (8a) on hull, has shackle (8h)
One end be connected with the lifting lug (8f) on connecting plate (2), cross spacing wirerope (8b), oblique limit wirerope when connection
(8c) should be at tensioning state；
6) it opens dock gate and flows into dock (5) by seawater, when the water surface in depressed place is concordant with extraneous water surface elevation, open automatically controlled sea cock and valve
(4), it allows seawater to flow freely into buoyancy tank, observes the waterline variation of hull, just reach closing when design helps floatation line wait intake
Automatically controlled sea cock and valve (4), ship can undock safely；
7) after ship is driven out to the waters that dock (5) reach respective water depth, stop navigation, after steady, open automatically controlled sea cock and valve
(4), it allows water to flow into buoyancy tank main body (1), observes in Hull sinkage to normal waterline or so, close automatically controlled sea cock and valve (4)；
8) the connection bolt on cross spacing wirerope (8b) and oblique limit wirerope (8c) one end shackle (8h) is disassembled manually
The other end of (8g), cross spacing wirerope (8b) and oblique limit wirerope (8c) is naturally drooped under gravity to ship
Body side is hung on hanging ring (8a), and the staff on hull is by cross spacing wirerope (8b) and oblique limit steel wire
Rope (8c) is recycled；
9) after ship sails out of, air pump (7) is opened and are drained with automatically controlled sea cock and valve (4), after water emptying, help floating device
The water surface is floated up to, dock (5) are dragged into；
10) water in dock (5) is emptied, to helping floating device to be disassembled, stored, completion helps floating operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811485276.8A CN109533220B (en) | 2018-12-06 | 2018-12-06 | Combined floating assisting device for large semi-submersible ship and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811485276.8A CN109533220B (en) | 2018-12-06 | 2018-12-06 | Combined floating assisting device for large semi-submersible ship and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN109533220A true CN109533220A (en) | 2019-03-29 |
| CN109533220B CN109533220B (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811485276.8A Expired - Fee Related CN109533220B (en) | 2018-12-06 | 2018-12-06 | Combined floating assisting device for large semi-submersible ship and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115092334A (en) * | 2022-07-01 | 2022-09-23 | 中船勘察设计研究院有限公司 | Semi-submersible buoyancy tank for dismantling support system and template on hydrophilic platform and use method |
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| CN109533220B (en) | 2020-07-24 |
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